PTI Bearing Catalog - Norfolkbearings.com

Roller Bearings
Eich Roller Bearings, manufactured in
Germany, are well respected for their
ability to function in elevated temperatures
while under heavy loads and
severe environments. The BR Series
spring wound, high load, high-impact BR Series—Solid Roller
solid roller design is ideally suited for
foot rolls (upper segment) of continuous
casters for steel mills. They are generally
used on billet, slab, bloom or beam
blank casters. The basic design consists
of an inner spring-wound race, a
set of cylindrical rollers capable of heavy
radial loads and an outer spring wound race. Thrust rings on each end
help contain and handle thrust. No other bearing offers these features
with such load carrying flexibility. The spring wound races expand and
contract naturally over a wide temperature range, yet stay tight on the
shaft and within the roll on which they are assembled. The BR Series is
designed to accommodate 350°C (600°F) temperatures. The wound coil
provides a pathway for contaminants to escape. The compact design
and simple installation make them ideally suited for such high temp
applications and harsh environments.
The B Series Bearings with spiral wound
rollers and flexible wound races allow the
most extreme operating temperatures
600°C (1000°F). One version used in Tunnel
Furnaces is manufactured exclusively
from spring strip steel. They can with
B Series—Flexible Roller
stand temperatures in excess of 450°C and
absorb impacts that occur from billets or
slabs contacting the rolls. A second variation
has been adopted for the furnace car
wheel, for example, and capable of temperatures
that exceeding 500°C. These are
essentially cylindrical roller bearings made
of high-temperature roller bearing steel.
The design of the bearings will adapt to
these extreme ambient conditions to eliminate the need for frequent
bearing replacement as is often the case with bronze bushed designs.
So both the solid or flexible roller designs with spring wound bearing
races are capable compact designs with a low sensitivity to contaminants.
They are easy to install and require no heating of components.
Installation: Spanner wrenches of different shapes for inner and outer
races, allow the installer to expand (unwind)
the inner race or tighten (wind-up)
the outer race, to slip inner ring onto shafts
or slide outer races into housing rolls.
Bearings are installed at room temperatures,
so no cooling of shafts or handling
hot bearings. Wrenches are provided with
new orders to make installation/training
simple.
Spanner Wrenches f or B & BR
Series Installation
Additionally, an installation/training
CD is also provided to demonstrate
the simple procedures for both installation and
removal, for inspection or for replacement procedures.
Often times, B and BR Series bearings can
be re-furbished and re-used, proper inspection and
evaluation techniques are demonstrated, saving
costly down time.
Eich Guide Rollers use the solid BR-Series
roller design and allow re-lubrication from the
shaft ends and easy installation and removal.
Guide rolls specifications are generally provide by
the customer. Standards do not exist. So custom
units are normally designed from customer
requirements and close dialogue on application
requirements.
Water-Cooled Split Bearings are designed to handle extreme loads at
elevated temperatures. The races are horizontally
split and allow simple roller and
race replacement without moving the equipment
or rolls on which they are mounted. A
classic application is a driven strand guide
rollers on a continuous caster.
Water Cooled Split Bearings are manufactured
like standard bearings, i.e. turned,
heat treated and ground. The final step is
the splitting of the race by wire-cut EDM,
which is a non-abrasive, precise operation.
Each unit under goes a full assembly and
test fit prior to release. The full compliment of rollers (no cage = allows
the maximum number of rollers) which provides the highest rating possible.
The water cooling feature will maintain a safe bearing operating
temperature while providing maximum support to the rolls. The cooling
water flows around the exterior jacket of the housing allowing the bearing
to function in the most severe ambient temperatures. Water inlets
and outlets are provided in the base of the housing. Water cooled units
are available for shaft sizes from 65mm thru 265mm.
SACRB Bearings: Eich also manufacturers SACRB type bearings
(Self Aligning Cylindrical Roller Bearing). This unit combines the load
carrying ability of a cylindrical bearing and the misalignment features of
a spherical bearings. Together with
expansion (float) capability, this bearing
is one of the most versatile and capable
units available. The floating unit consists
of an inner race, a set of rollers and
two outer races. The fixed bearing is
supplied with two thrust rings. SACRB
units are fully interchangeable with the
toroidal roller (CARB) bearings. SACRB
bearings include a full compliment of
cylindrical rollers in a spherical shell with
a cylindrical OD. This bearing will allow
axial expansion and angular alignment
all in one compact unit. The load capability
of this bearing is extremely high,
well beyond a comparable spherical
roller bearings, due to the full compliment (maximum number possible)
and extra wide rollers for the maximum load rating. SACRB Bearings
are available for driven or non driven rolls. They allow higher loads than
equivalent CARB Bearings. SACRB are typically have a 10 to 25%
higher rating than a comparable CARB bearing and typically 20 to
30% above the similarly sized Spherical bearings.
Size Range: Eich bearings are available for 25mm shaft sizes and up
to outer diameters of 600mm and anything between. Eich Bearings are
well respected in the industry for being a leader in these customized,
uniquely featured and highly capable spring wound bearings.
P.T. International Corp.
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